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Electrocatalytic Hydrogen Evolution of Cobalt and Free‐base Triaryl Corrole Bearing Hydroxyethyl Amino Groups
Author(s) -
Chen Ying,
Fan QiHang,
Hossain Md Sahadat,
Zhan ShuZhong,
Liu HaiYang,
Si LiPing
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201900996
Subject(s) - corrole , trifluoroacetic acid , chemistry , cobalt , free base , catalysis , base (topology) , acetic acid , electrocatalyst , solvent , organic base , medicinal chemistry , inorganic chemistry , polymer chemistry , organic chemistry , electrochemistry , mathematical analysis , salt (chemistry) , mathematics , electrode
Four free‐base corroles (F 15 C, F 12 C, F 10 C, F 8 C) and their cobalt(III) complexes were used as homogeneous electrocatalysts for hydrogen evolution using acetic acid, trifluoroacetic acid and water as proton sources. Free‐base corrole was firstly reported as electrocatalyst for H 2 evolution. The results showed that free‐base corrole was active in electrocatalytic hydrogen evolution reaction (HER) in trifluoroacetic acid. And cobalt(III) corroles bearing hydroxyethyl amino groups were more efficient in HER as compared to their benchmark corroles. The catalytic active species of four tested cobalt(III) corroles were Co II ‐H in acetic acid/dimethylformamide solvent. In water solution, both Co III ‐H and Co II ‐H may be involved in HER. Interestingly, when trifluoroacetic acid was used as proton source, Co II ‐H was the mainly active intermediate for F 15 CCo and F 10 CCo, and Co III ‐H for F 12 CCo and F 8 CCo, respectively. As for the free‐base corrole, ( · Cor)H 4 and [( · Cor)H 3 ] – were the catalytic active species.